Improvement in grain-driers



UNITEE STATES PATENT OEEIGE.

IVILLIAIWI J. DEMUTH, 0F MATTOON, ILLINOIS.

IMPROVEMENT IN GRAIN-DRIERS.

Specification forming part of Letters Patent No. 150,002, dated April21, 1874; application tiled November 13, 1873.

.To all whom 'it may concern:

Be it known that I, W. J. DEMUTH, of Mattoon, in the county of Coles andin the State of Illinois, have invented certain new and usefulImprovements in Machines for Drying Grain, Meal, and Malt 5 and dohereby declare that the following` is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,and to the letters of reference marked thereon, making a part of thisspecification.

The nature of my invention consists in the construction and arrangementot a machine for drying grain, meal, malt, &e., by steam, as will behereinafter more fully set forth.

In order to enable others skilled in the art to which my inventionappertains to make and use the saine, I will now proceed to describe itsconstruction and operation, ret'errin g to the annexed drawing, inwhich- Figure l is a plan view, Fig. 2 a transverse vertical section,and Fie'. 3 a longitudinal vertical section, of my machine.

A and B represent two hollow iron tubes of any suitable length anddiameter, provided with a number of small tubes, a a, inserted in thelarger pipes by means ot' screw-threads, and tapping the bore of thelarge pipes, but having their outer ends closed by any suitable means toprevent the escape of the steam. The small tubes ay a may be round,flat, or any other desired shape, and set in spiral shape on the largepipes A B, so as to serve as a screw or conveyer to move the articles tobe dried from one end of the boxes in which they are placed to theother. The conveyers thus constructed are placed in open boxes C and I),and connected at one end by a curved or angular steam-pipe, E, and arefurther connected together and rotated by means of cogwheels G G, 011eof the conveyers being connected with the engine or other convenientpower to be easily rotated. The large tubes or pipes A B are provided attheir ends with stufng-boxes H H, to confine the steam from passing outfrom the steam-pipes while the machine is making a rotary motion, andwhile conveying steam to the drier, and from it and out of the building.I represents the stea1npipe which conducts the steam from the engine orboiler to heat the eonveyers, and I is' the pipe conveying the steamaway from the conveyers. The pipes A B, with their smaller tubes a a,may be heated by exhaust steam from the engine, or by steam direct fromthe boiler.

The grain, meal, or other articles to be dried is poured into the box Cat the end b, and. carried by the conveyer A a to the end el ot saidbox, where it passes through the aperture e into the box l), and iscarried back by the conveyer B a to the other end ot' said box, where itpasses out ofthe machine dried. The pipes A and B are laid inclined inopposite directions, and they, as well as the small pipes c a, areheated bythe steam passing through, as above described. The small pipesa a act as shovels, and stir the grain or other articles, thoroughlyheating it, and exposing it continually to the open air, as the tops ofthe boxes are open, allowing the moisture to pass otl" freely. A

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

The rotating pipes A and B, provided with hollow spirallyarranged arms aa, which are closed at their outer ends, forming conveyers, placed,respectively, in boxes C and I), and inclined in opposite directions,for the purpose of drying grain or other articles by steam,substantially as herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand this18th day of October, 1873.

fVILLIAM J. DEMUTH.

Witnesses GEO. W. LYNN, -H. P. GorPAGE.

